{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53166", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.389Z", "datePublished": "2026-06-25T08:38:46.089Z", "dateUpdated": "2026-06-25T08:38:46.089Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-25T08:38:46.089Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfutex/requeue: Prevent NULL pointer dereference in remove_waiter() on self-deadlock\n\nWhen FUTEX_CMP_REQUEUE_PI requeues a non-top waiter that already owns the\ntarget PI futex, task_blocks_on_rt_mutex() returns -EDEADLK before setting\nwaiter->task.\n\nThe subsequent remove_waiter() in rt_mutex_start_proxy_lock() dereferences\nthe NULL waiter->task, causing a kernel crash.\n\nAdd a self-deadlock check for non-top waiters before calling\nrt_mutex_start_proxy_lock(), analogous to the top-waiter check in\nfutex_lock_pi_atomic()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/futex/requeue.c"], "versions": [{"version": "3fb7394a837740770f0d6b4b30567e60786a63f2", "lessThan": "16f8e17184b31382076f84751db5ac51fc02733e", "status": "affected", "versionType": "git"}, {"version": "88614876370aac8ad1050ad785a4c095ba17ac11", "lessThan": "1f2f3f3eacd6653ab215c5d2ea70811148d433fc", "status": "affected", "versionType": "git"}, {"version": "3bfdc63936dd4773109b7b8c280c0f3b5ae7d349", "lessThan": "74e144274af39935b0f410c0ee4d2b91c3730414", "status": "affected", "versionType": "git"}, {"version": "d8cce4773c2b23d819baf5abedc62f7b430e8745", "status": "affected", "versionType": "git"}, {"version": "8a1fc8d698ac5e5916e3082a0f74450d71f9611f", "status": "affected", "versionType": "git"}, {"version": "6d52dfcb2a5db86e346cf51f8fcf2071b8085166", "status": "affected", "versionType": "git"}, {"version": "6.1.175", "lessThan": "6.2", "status": "affected", "versionType": "semver"}, {"version": "6.6.140", "lessThan": "6.7", "status": "affected", "versionType": "semver"}, {"version": "6.12.86", "lessThan": "6.13", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/futex/requeue.c"], "versions": [{"version": "6.18.27", "lessThan": "6.18.36", "status": "affected", "versionType": "semver"}, {"version": "7.0.4", "lessThan": "7.0.13", "status": "affected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18.27", "versionEndExcluding": "6.18.36"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.0.4", "versionEndExcluding": "7.0.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.175"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.140"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.86"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/16f8e17184b31382076f84751db5ac51fc02733e"}, {"url": "https://git.kernel.org/stable/c/1f2f3f3eacd6653ab215c5d2ea70811148d433fc"}, {"url": "https://git.kernel.org/stable/c/74e144274af39935b0f410c0ee4d2b91c3730414"}], "title": "futex/requeue: Prevent NULL pointer dereference in remove_waiter() on self-deadlock", "x_generator": {"engine": "bippy-1.2.0"}}}}

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